Rock a shirt jacket with a yellow short sleeve shirt for relaxed dressing with a modern spin. If you're hesitant about how to round off, a pair of brown suede desert boots is a nice option. So so as you can see, it's an on-trend, not to mention spring-friendly, getup to have in your transeasonal wardrobe. When it comes to dressing ideas for 30-something Millennial guys, this outfit looks good on almost any guy.